Process for producing front yoke-axles.



A. JOHNSON & G. L. BOGKUS. PROCESS FOR PRODUCING FRONT YOKB' AXLES,

APPLICATION FILED KARA, 1910.

963 Patented July 5,1910.

Fig. l.

, Q l 3a part-ED STATES PATENT onnton.

AI. RED JOHNSON AND CHARLES L. BOCKUS, OF DETROIT, MICHIGAN.

PROOESSFOR PRODUCING FRONT YOKE-AXLES.

Specification of Letters Patent.

Patented July 5, 1910.

Application filed March 4, 1910. Serial No. 547,208.

Britain. residing at Detroit. county of' Via r11e,State of Michigan, have invented a certain new and useful Imp ovement in Processes for Producing a Front Yoke-Axle, and declare the following to be a full, clear, and exact description of the. same, such ,as will enable others skilled in the art to which it pertains to make and use the same. reference being had to the accompanying drawings. which form a part of this specification.

This invention relates to the art of producing the front axle yoke of an' automobile vehicle.

The front axle yoke commonly used has at each end thereof. a fork. one member of which serves as a foot bearing and the other as an upper bearing member for a vertical spindle or shaftupon which the axle and hub of the front wheel swing. and in the construetion of this axle yoke, which should be as light. 4 it is possible consistent with the requisite strength. it is desirable that. the striwturebe made with the gain of the metal running along the main body of the yoke, along the axes of the-two forked members or yoke members. aud along the connecting part of the fprk. as the lines of usual breakage are across the axes of the members referred to. i

In the process which is hereinafter described. a straight bar of metal is selected and bent and drawn to the requisite shape, care heing taken in the several stepsot the process to keep the arrangement of the grain olv the metal in the desired way as specified. tn the dra\\'ings:- --ligure 1. shows a bar of metal that has lwentreated according to 'the first step of theprocess. Fig. 9. h ws it after treatment according to the second step. Fig. 3. shows its shape and condition at'ter it has been treated according to the third step. Fig. -'t-. shows its shape and condition when it is finished after being treated according to the fourth step.

bar tfis selected that has thedesirod or requisite cross diameter and length. it is heated and upset at a point intermediate its t ends and at a point suitable for the junction of the two branches of the yoke. Without reheating. and While still under the original heat it is upset a second time between the point of the first upset and the end of the bar, producing two upset portions or two enlarged portions. both of which are near the end of the bar on which the fork is to be. made. The third step results in bending the bar at the upset portion .2. and substantially throwing the enlargement of this upset portion to the outside of the bend, the bend being made at substantially the line 3-3 of Fig. 2. During the same operation the upset portion 3 is swaged down and broadened out to form a spring seat 3 as shown in Fig.

3. The third step results in the drawing out ot the enlarged portion 2 into the fork or prong 2 and bending the end 2 to make the upper branch of the born 2% bringing the axes of the branches 9 and 2 mto parallel relation and forming theinwith dies to the proper shape. All of the steps are carried out with the aid ofdies and presses.

\Vhat we claim as novel is The art of producing the front axle yoke of an automobile vehicle, consisting in upsetting a bar of metal intermediate its ends to produce an enlargement; second: again up- I setting the bar of metal iutermediateits ends to produce a second eulargmnent, one of said.

enlargements being tinally used for the spring seat. and the ether of said enlargemeutsbeingfinalh used for the foot bearing; third. compressing one of said enlargements to form a spring Salt and bending the bar clo ely adjacent to the other of said enlargements. and thereby throwing the. enlargement to the outside of the said bending; fourth. d1'a\\'ing and shaping the last-111cm tioned enlargement to the toot bearing of an axle yoke. and bending the projecting end to form the upper bearing of said axle yoke, substantially as described.

in testimony whereof. we sign this speeiticatiouiu the presence of two witnesses.

ALFRED JOHNSON. Y CHARLES L. BOCKUS. \Vituesses R. A. Parana, \VILm-nu M. SWAN. 

